The Physical and Chemical Composition of the Hair

The chemical make up of hair, it's growth pattern.  Components of the hair, Kertanization etc..

15 cards   |   Total Attempts: 182
  

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Cards In This Set

Front Back
Follicle
Answer 1
A tube like depression that is filled with the hair root
Hair Root
Located below the surface of the scalp.
Hair Shaft
Is the portion of hair that projects above the skin
Hair Bulb
A thickened club like stucture that forms the lowest part of the hair root
Dermal papilla
Is a small cone like elevation at the base of the follicle that fits into the hair bulb containing blood and nerve supply and provides nutrients.
Arrector Pili
A small involuntary muscle fibre that is inserted into the base of the hair follicle and contracts when exposed temperature change.
Subaceous Gland
Glands of the skin connected to the follicle that secrete natural oil called Sebum, Sebum lubricates the hair and skin.
Cuticle
The outermost layer of the hair consisting of single overlapping layers of translucent scale like cells that overlap like shingles on a roof. A healthy compact layer helps protect hair against damage.
Cortex
The middle layer of the hair shaft that contains 90% pigment of the hairs total and gives strenght and elasticity
Medulla
Is the innermost layer composed of round cells and not always present, fine or blonde hair lacks medulla
THE CHEMICAL COMPOSITION OF THE HAIR FOLLICLE

The Hair is composed of _______ that grows from cells withink the follicle. This is where the hair shaft begins. As soon as these cells form the move upward through the follicle.
Protein
As the cells ___ they fill up with fibrous protein called keratin, move upward, lose thir nucleus and die This Maturing process is called ?
Keratinization by the time the hair emerges from the scalp the cells are kertanized and no longer living.
The hair is composed of what percentage of Protein
90%
The five elements that make up the hair are
Carbon, Oxygen, Nitrogen, Sulfur, and Hydrogen
Hydrogen Bond
Is a weak physical side bond broken by water or heat.